Inner-tube tire-mold.



T. W. MORRIS.

INNERTUBE TIRE MOLD.

APPLICATION FILED MAY I4, 1915.

11 1 @8.,@@ IL Patented June 20, 1916.

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'II-IOIVIAS W. MORRIS, OF CHICAGO, ILLINOIS, ASSIGNOR 0F ONE-HALF TO GEORGE "B. DBYDEN, OF CHICAGO, ILLINOIS.

INNER-TUBE TIRE-MOLD.

Lil 88,09

To all whom it may concern Be it known that I, THOMAS W. MORRIS, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements 1n Inner-Tube TireMolds; and I 'do hereby declare that the following is a full, clear, and exact description of the same, reference being bad to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

Heretofore it has been the practice in the manufacture of inner tubes for automobile tires, to form the same tubes, which; are cut into vulcanized to make After which process, the tubing is bent into circular form, the intersecting ends thereof being either cemented, vulcanized, or cemented and vulcanized together to form a finished inner tube. This process has however proven unsatisfactory, for the reason that the inner periphery of the tubes thus formed is cramped, while the outer periphdesired lengths and I ery of the tube is stressed under tension.

The above mentioned process has, however, beenimproved upon, and inner tubes are now manufactured in standard circular tire forms, after which they are placed in molds comprising sections adapted to be fastened together. 'The tubes vulcanized in this type have invariably formed on the outer side surfaces thereof, ridges, caused by the hot material, during the process of vulcanization, flowing into the grooves formed by the intersection of the mold sections. The ridges thus formed on the exterior sides of inner tubings are, of course, objectionable, since they may prove a-constant source of trouble and an-- noyance by inducing Wear and heating within a tire casin This invention therefore, relates to an improved inner tube mold construction in which the mold consists of but a single annular section, and an interfitting split rim member, so formed to eliminate the objectionable inner side grooves, and permitting the manufacture of an inner tube free from side or to ridges thus presenting a-smooth outer sur ace to the interior of the tire casin which they are to be used.

t is an object of this invention to con Specification of Letters Patent.

Application and May 14, 1915.

into long straight' the same air proof.

. said casin grooves.

Patented June 2Q, 1916. Serial No. 27,970.

struct an inner tube vulcanizing mold wherein but a single annular caslng is used in connection with a split innerperipheral mm.

It is also an object of this invention to construct an inner tube vulcanizing mold 80 tlon to construct an inner tube vulcanizing mold consisting of a single annular casing having integral tongues arranged to inte'ifit a grooved split band section, providing an even and smooth interior surface for the production of inner tubes free from'ridges on the sides thereof.

It is finally an object of this invention to construct a resilient inner tube tire mold or on the outer periphery comprising an interfitting annular casing and a plate adapted to be and a split rim, sprung into the rim member-to maintain the mold assembled.

The invention (in a more fully described.

In the drawings: Figure 1 is a side view of a mold, showing the inner tube valve stem projecting therethrough. Fig. 2 isa section on line 22, of Fig. l, with the inner tube omitted. Fig. 3 is an enlarged detail sectionon line3-3 of Fig. 1, with the inner tube omitted.

As shown on the drawings: the vulcaniz ing mold consists of .an annularcasing 1, having tongues 2, formed integral'with the edges thereof. Mounted on the'inner periphery of easing l, is a split rim 3, having a pair of parallel grooves 4, formed onv the outer the tongues 2, and fitting evenly Within to produce a smooth inner surface substantially free .from

In order that the casin '1, and said rim 3, maybe one another, 5, is provided mold an apertured clamping-plate to receive a valve, stem 6, of

an inner tube therethrough. Said plate'5', is H sprung into the gap between the ended the rim 3, and is firmly held in place by a nut 7 which is threaded upon the valve stem 6, which projects through the aperture in said plate, thus expanding the rim 3, to produce a tight fit between the mold members.

The operation is. as follows: When is im r preferredform) is up illustrated 1n the drawings and hereinafter80 periphery of said rim, to receive at tightlyassemb ed, with ice into desfpred tovulcanize an inner tire tube, the r1m'3 1S removed from the casing 1, and the tube is nserted into the metal casing. The

mold is then assembled by placing the rim 3,

5 with the tongues 2, of the casing, fitting into finished vulcanized inner tire tube free from objectionable side or top ridges or beads. In order that the tube may tightly fit against the inner surface of the mold, during the process OLE-vulcanization, air and a small quantity of Water may be introduced into the tube, which upon the application of heat, produce steam and. a pressure suilicient to expand the tube into the proper position within the mold.

I am aware that various details of construction may be varied through a wide range Without departing from the principles of this invention. I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1. In a tube mold of the class described, a unitary annular casing, a rim engaged therewith, andresilient means adapted to be sprung into said rim to lock said casing and rim together.

2. In a device of the class described, a vnlcanizing tube mold, comprising a casing, integral tongues thereon, an inner rim havmg grooves therein, said casing and rim adapted to interfit one another.

3. In a device of the class described, a vulcanizing mold, comprising a casing, a split rim adapted to fit on the inner periphcry thereof, and a clamping plate adapted to be sprung into said rim to firmly hold said casing and run together.

4. In a vulcanizmg mold of the class desaid rim to securely hold said lace and securely held by means of the grooves on the outer circumference thereof ada )ted to receive said ton -nos V and a. plate adapted to be inserted between the ends of casting and rim together.

In a. vulcani'zzing mold of the class described, a seamless unitary casing, an ex pansion hand having grooves therein adapted to receive the edges of said casing cngaged in said grooves, and a clamping plate to hold said band iirn'ily braced against said casing.

(i. In a device of the class described, a circular casing having an endless inner periph eral opening, tongues Formed integral with the edges thereof, and closure means for said "using having grooves therein permitting said tongues io loclringly engage in said. grooves.

7. In a. vulcanizing mold of the class dcscribed, a circular casing having an opening to receive a circular tire tube, a .latenilly split expansion band having. a. plurality of grooves therein adapted to permit said casing to engage with said band and interlit into said grooves.

8. In a device of the class described adapted to receive an inner tube and its valve, of means coacting with said valve to hold said device assembled.

9. In a device of the class described, a vulcanizing mold, comprising a casing, a split rim adapted to fit on the inner pcriph ery thereof, an apertured clamping plate adapted to be sprunginto said rim to firmly hold said casing and rim together, and means for remo ably holding said plate in position in said rim;

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

THOMAS W'. MORRIS.

lVitnesses:

Cimnnns \V. HILLS, J12, LEON M. Rmns'rnm. 

